content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicReference;
  
  import io.reactivex.common.*;
  import io.reactivex.common.Scheduler.Worker;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.common.internal.schedulers.TrampolineScheduler;
  import io.reactivex.observable.*;
  
  public final class ObservableIntervalRange extends Observable<Long> {
      final Scheduler scheduler;
      final long start;
      final long end;
      final long initialDelay;
      final long period;
      final TimeUnit unit;
  
      public ObservableIntervalRange(long start, long end, long initialDelay, long period, TimeUnit unit, Scheduler scheduler) {
          this.initialDelay = initialDelay;
          this.period = period;
          this.unit = unit;
          this.scheduler = scheduler;
          this.start = start;
          this.end = end;
      }
  
      @Override
      public void subscribeActual(Observer<? super Long> s) {
          IntervalRangeObserver is = new IntervalRangeObserver(s, start, end);
          s.onSubscribe(is);
  
          Scheduler sch = scheduler;
  
          if (sch instanceof TrampolineScheduler) {
              Worker worker = sch.createWorker();
              is.setResource(worker);
              worker.schedulePeriodically(is, initialDelay, period, unit);
          } else {
              Disposable d = sch.schedulePeriodicallyDirect(is, initialDelay, period, unit);
              is.setResource(d);
          }
      }
  
      static final class IntervalRangeObserver
      extends AtomicReference<Disposable>
      implements Disposable, Runnable {
  
  
          private static final long serialVersionUID = 1891866368734007884L;
  
          final Observer<? super Long> actual;
          final long end;
  
          long count;
  
          IntervalRangeObserver(Observer<? super Long> actual, long start, long end) {
              this.actual = actual;
              this.count = start;
              this.end = end;
          }
  
          @Override
          public void dispose() {
              DisposableHelper.dispose(this);
          }
  
          @Override
          public boolean isDisposed() {
              return get() == DisposableHelper.DISPOSED;
          }
  
          @Override
          public void run() {
              if (!isDisposed()) {
                  long c = count;
                  actual.onNext(c);
  
                  if (c == end) {
                      DisposableHelper.dispose(this);
                      actual.onComplete();
                      return;
                  }
  
                  count = c + 1;
  
              }
          }
  
          public void setResource(Disposable d) {
              DisposableHelper.setOnce(this, d);
          }
      }
  }
  